103 lines
3.0 KiB
C++
103 lines
3.0 KiB
C++
#pragma once
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#include "database/db_accessor.hpp"
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#include "storage/edge_accessor.hpp"
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#include "storage/edge_type/edge_type.hpp"
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#include "storage/label/label.hpp"
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#include "storage/vertex_accessor.hpp"
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namespace serialization
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{
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// Serializes Vertex to given writer which implements GraphEncoder.
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template <class W>
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void serialize_vertex(VertexAccessor const &v, W &writer)
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{
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writer.start_vertex(v.id());
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auto const &labels = v.labels();
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writer.label_count(labels.size());
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for (auto &label : labels) {
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writer.label(label.get().str());
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}
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auto const &propertys = v.properties();
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writer.property_count(propertys.size());
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for (auto &prop : propertys) {
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writer.property_name(prop.key.family_name());
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prop.accept_primitive(writer);
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}
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writer.end_vertex();
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}
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// Serializes Edge to given writer which implements GraphEncoder.
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template <class W>
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void serialize_edge(EdgeAccessor const &e, W &writer)
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{
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writer.start_edge(e.from().id(), e.to().id());
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writer.edge_type(e.edge_type().str());
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auto const &propertys = e.properties();
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writer.property_count(propertys.size());
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for (auto &prop : propertys) {
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writer.property_name(prop.key.family_name());
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prop.accept_primitive(writer);
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}
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writer.end_edge();
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}
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// Deserializes vertex from reader into database db. Returns Id which vertex had
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// in the reader and VertexAccessor.
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template <class D>
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std::pair<Id, VertexAccessor> deserialize_vertex(DbAccessor &db, D &reader)
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{
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auto v = db.vertex_insert();
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auto old_id = reader.vertex_start();
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std::string s;
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for (auto i = reader.label_count(); i > 0; i--) {
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auto &label_key = db.label_find_or_create(reader.label().c_str());
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v.add_label(label_key);
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}
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for (auto i = reader.property_count(); i > 0; i--) {
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auto &family =
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db.vertex_property_family_get(reader.property_name().c_str());
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v.set(StoredProperty<TypeGroupVertex>(
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family, reader.template property<Property>()));
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}
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reader.vertex_end();
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return std::make_pair(old_id, v);
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}
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// Deserializes edge from reader into database db. Returns loaded EdgeAccessor.
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// S - is the storage with at() method for accesing VertexAccessor under thers
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// deserialization local id returnd from deserialize_vertex.
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template <class D, class S>
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EdgeAccessor deserialize_edge(DbAccessor &db, D &reader, S &store)
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{
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auto ids = reader.edge_start();
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VertexAccessor &from = store.at(ids.first);
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VertexAccessor &to = store.at(ids.second);
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auto e = db.edge_insert(from, to);
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auto &edge_type_key = db.type_find_or_create(reader.edge_type().c_str());
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e.edge_type(edge_type_key);
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for (auto i = reader.property_count(); i > 0; i--) {
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auto &family =
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db.edge_property_family_get(reader.property_name().c_str());
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e.set(StoredProperty<TypeGroupEdge>(
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family, reader.template property<Property>()));
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}
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reader.edge_end();
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return e;
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}
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};
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